Ulincos Momentary Push Button Switch U19D1 1NO SPST Silver Stainless Steel Shell with Red LED Ring Suitable for 19mm 3/4" Mounting Hole Pack with a Resistor Momentary switch: Push & Hold,ON; Release,OFF There is no pigtails for U19D1 switch.It need to be soldered carefully The switch and LED are separated, LED can be on all the time or only on when switch is on,depending on how you wire it The rated voltage of the LED is 1.8 - 2.8V, with soldering the resistor in the package, you can fit it for 12V system Great for electromagnetic starter, relay, Horn Button Switch, PC Power Switch or any circuit controls